Production of highly concentrated paraffin wax



Patented Oct. 11, 1932 MARTIN MUELLER-CONRADL OFLUBWIGSHAIFEN-ON-THE-BHINE, IBERTHOLD OTTENS, OF NEUBOESSEN, GERMANY,

vASSIG'NQRS TO I. G. FARBENINDUSTRIE AKTIENGESELLSCHAFT, OFFRANKFORT-ON-THE-MAIN, GERMANY, A. CORPORATION I OF GERMANY PRODUCTIONOF HIGHLY CONCENTBATED PARAFFIN WAX No Drawing. Applicationfiled m 19,1929, semi no. 879,566, aiiii "in Germany September 5, 192:.

This invention relates to improvements in the manufacture and productionof hlghly concentrated paraflin wax.

-- We have found that a highly concentrated parafiin wax can be obtainedfrom paraflin wax, which may still contain considerable quantities ofoil in a very satisfactory manner by treating the crude paraflin waxwith water to which a wetting agent, which .term also comprisesemulsifying agents has been added.

For example a crude parafiin wax which has been obtained by coolingmineral oil or tar oils, for example brown coal tar oil or destructivehydrogenation products of carbonaceous materials and filtration bysuction can be treated while still on the filter with water to which alittle soap has been added. Or the crude parafiin wax can be placed in acentrifuge, and if desired after separating a portion of. the oil bycentr1fug- 1 ing, can be washed, while centrifuging, with an a ueoussolution of soap. Other devices whic are suitable for this treatmentmay.

also be employed. Instead of an aqueous soap solution aqueous solutionsof other wetting agents such as aromatic and in particular polynuclearsulphonic acids, and especially such as are alkylated in the nucleus,

for example isobutylated' naphthalene sulphonic acids, which may also beemployed in theform of'their salts, or potassium, sodium or ammoniumsoaps, or saponified oxidation products of parafiin wax or similarsubstances may be employed. The saponified oxidation products ofparafiin wax are obtained by treatment of the oxidation products ofsolid parafiin hydrocarbons with a quantity of alkali metal hydroxidesuflicient 'or less than sufficient for the saponification of thesaponifiable constituents, if desired with the addior other substances.to the present invention may be carried out tion, before or after thesaponification, of water-insoluble substances. in particularhydrocarbons or their derivatives which if desired may contain dissolvedtherein sulphur The process according at low, ordinary or elevatedtemperatures for example between 0 and 5 0? centigrade. The

treatment is often carried out with the paraflin wax in a solid state.

The following examples will further illustrate the nature of thisinvention, but the invention is not restricted to these examples.

Example 1 A crude paraflin wax, containing about per cent of paraflinwax, obtained by cooling a destructive hydrogenation product of browncoaland filtration, is well washed with a 2 per cent solution ofpotassium soap while still on the filter. An approximately 95 per centparafiin wax of a white colour is obtained.

Ewample 2 A paraffin wax containing about per solution of sodiumisopropylnaphthalene sulphonate a product having a paraffin wax con tentof 95 per cent or more is obtained. The paraflin wax is melted and isthus separated from the adherent aqueous fraction. The solution employedfor washing may be employed again after separation of the oil.

What we claim is:

1. A process for the production of highly concentrated paratfin wax,which comprises actin on hard crude paraflin wax with water containingan aromatic sulphonic acid.

2. A process for the concentrated paraffin wax, which comprises actingon hard crude paraflin wax with water containing alkylated polynucleararomatic sulphonic acid.

3. A process for the concentrated paraflin passing through hardproduction of highly wax, which comprises phonic acid in the form of itssodium salt.

a 4. A process for the production of highly-100 production of highlycrude parafiin wax an aqueous solution of isopropylnaphthalene'sulconcentrated paraffin wax which comprises passing through hard crudeparaflin wax an aqueous solution of isopropylnaphthalene sulphonic acidin the form of its sodium salt -v while centrifuging.

5. In the production of highly concentrated 'paraflin wax by washinghard crude paraflin wax with water containing a wetting agent selectedfrom the class consisting of aromatic sulfonic acids and saponifiedoxidation products of paraflin wax, the step which comprises forcingwater containing said wetting agent through the said wax while the waxis m a solid state.

15 6. A process for the production of highly concentrated arafiin waxwhich comprises acting on har crude paraflin wax with water conta ning awetting agent selected from the class consisting of aromatic sulfonicacids 20 and saponified oxidation products of paraflin wax.

7. A process for the production of highly concentrated parafiin waxwhich comprises acting on hard crude paraflin wax withwater 25containing a saponified oxidation product of paraffin wax.

In testimony whereof we have hereunto set our hands.

MARTIN MUELLER-CUNRADI. 3 BERTHOLD OTTENS.

